Category: Image of the Day
Quadrantids over the Great Wall
Named for a forgotten constellation, the Quadrantid Meteor Shower is an annual event for planet Earth’s northern hemisphere skygazers The shower’s radiant on the sky lies within the old, astronomically obsolete constellation Quadrans Muralis. That location is not far from...
The Fainting of Betelgeuse
Begirt with many a blazing star, Orion the Hunter is one of the most recognizable constellations. In this night skyscape the Hunter’s stars rise in the northern hemisphere’s winter sky on December 30, 2019, tangled in bare trees near Newnan,...
Betelgeuse Imagined
Why is Betelgeuse fading? No one knows. Betelgeuse, one of the brightest and most recognized stars in the night sky, is only half as bright as it used to be only five months ago. Such variability is likely just normal...
Cassini Spacecraft Crosses Saturns Ring Plane
If this is Saturn, where are the rings? When Saturn’s “appendages” disappeared in 1612, Galileo did not understand why. Later that century, it became understood that Saturn’s unusual protrusions were rings and that when the Earth crosses the ring plane,...
A Distorted Sunrise Eclipse
Yes, but have you ever seen a sunrise like this? Here, after initial cloudiness, the Sun appeared to rise in two pieces and during partial eclipse, causing the photographer to describe it as the most stunning sunrise of his life....
A Partial Solar Eclipse Sequence Reflected
What’s happened to the Sun? Yesterday, if you were in the right place at the right time, you could see the Sun rise partially eclipsed by the Moon. The unusual sight was captured in dramatic fashion in the featured image...
An Annular Solar Eclipse over New Mexico
What is this person doing? In 2012 an annular eclipse of the Sun was visible over a narrow path that crossed the northern Pacific Ocean and several western US states. In an annular solar eclipse, the Moon is too far...
A Northern Winter Sky Panorama
What stars shine in Earth’s northern hemisphere during winter? The featured image highlights a number of bright stars visible earlier this month. The image is a 360-degree horizontal-composite panorama of 66 vertical frames taken consecutively with the same camera and...
Places for OSIRIS REx to Touch Asteroid Bennu
Where is the best place to collect a surface sample from asteroid Bennu? Launched in 2016, NASA sent the robotic Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer (OSIRIS-REx) to investigate the 500-meter-across asteroid 101955 Bennu. After mapping the near-Earth...
Late Afternoon on Mars
Shadows grow long near sunset in this wide panoramic view from the Curiosity rover on Mars. Made with Curiosity’s navcam, the scene covers about 200 degrees from north through east to south (left to right), stitched together from frames taken...